﻿using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.IO;
using System.Text;
using System.Diagnostics;
using System.Runtime.Serialization.Formatters.Binary;
using ICSharpCode.SharpZipLib;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.GZip;
using ICSharpCode.SharpZipLib.BZip2;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;

using System.Net;

public partial class utp : System.Web.UI.Page
{
    public IPHostEntry hostInfo;
    public HttpBrowserCapabilities userbc;

    protected void Page_Load(object sender, EventArgs e)
    {
        hostInfo = Dns.GetHostEntry(Request.ServerVariables["SERVER_NAME"]);
        userbc = Request.Browser;
    }
    protected void btnClearCache_Click(object sender, EventArgs e)
    {
        GC.Collect();
        litClearCacheList.Text = "<br />共有 " + Cache.Count.ToString() + " 项被清除：";
        foreach (DictionaryEntry de in Cache)
        {
            litClearCacheList.Text += String.Format("<br />=> {0} 清除成功...", de.Key);
            Cache.Remove(de.Key.ToString());
        }
        litClearCacheList.Text += "<br />完毕！";
    }

    protected void btnZip_Click(object sender, EventArgs e)
    {
        string[] FilePathS = new string[2];
        FilePathS[0] = HttpRuntime.AppDomainAppPath + "\\" + txtZipSource.Text.Trim();  //待压缩的文件目录
        FilePathS[1] = HttpRuntime.AppDomainAppPath + "\\" + txtZipDestination.Text.Trim();  //生成的目标文件

        try
        {
           ClassZip.Zip(FilePathS[0], FilePathS[1], 6);
           litZipTip.Text = "<br />压缩指令已发出。";
        }
        catch(Exception ex)
        {
            litZipTip.Text = "<br />压缩指令未能成功发出：" + ex.Message;
        }
    }

    protected void btnUnZip_Click(object sender, EventArgs e)
    {
        string[] FilePathS = new string[2];
        FilePathS[0] = HttpRuntime.AppDomainAppPath + "\\" + txtUnZipSource.Text.Trim();  //待解压的文件
        FilePathS[1] = HttpRuntime.AppDomainAppPath + "\\" + txtUnZipDestination.Text.Trim();  //解压目标存放目录
        try
        {
            UnZipClass.UnZip(FilePathS[0], FilePathS[1]);
            litUnZipTip.Text = "<br />解压指令已发出。";
        }
        catch (Exception ex)
        {
            litUnZipTip.Text = "<br />解压指令未能成功发出：" + ex.Message;
        }
    }
}

#region 压缩类

class ClassZip
{
    /// <summary>
    /// 递归压缩文件夹方法
    /// </summary>
    /// <param name="FolderToZip"></param>
    /// <param name="s"></param>
    /// <param name="ParentFolderName"></param>
    private static bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
    {
        bool res = true;
        string[] folders, filenames;
        ZipEntry entry = null;
        FileStream fs = null;
        Crc32 crc = new Crc32();
        try
        {

            //创建当前文件夹

            entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/")); //加上 “/” 才会当成是文件夹创建

            s.PutNextEntry(entry);
            s.Flush();


            //先压缩文件，再递归压缩文件夹

            filenames = Directory.GetFiles(FolderToZip);
            foreach (string file in filenames)
            {
                //打开压缩文件

                fs = File.OpenRead(file);
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
                entry.DateTime = DateTime.Now;
                entry.Size = fs.Length;
                fs.Close();
                crc.Reset();
                crc.Update(buffer);
                entry.Crc = crc.Value;
                s.PutNextEntry(entry);
                s.Write(buffer, 0, buffer.Length);
            }
        }
        catch
        {
            res = false;
        }
        finally
        {
            if (fs != null)
            {
                fs.Close();
                fs = null;
            }
            if (entry != null)
            {
                entry = null;
            }
            GC.Collect();
            GC.Collect(1);
        }


        folders = Directory.GetDirectories(FolderToZip);
        foreach (string folder in folders)
        {
            if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
            {
                return false;
            }
        }

        return res;
    }

    /// <summary>
    /// 压缩目录
    /// </summary>
    /// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>
    /// <param name="ZipedFile">压缩后的文件名，全路径格式</param>
    /// <returns></returns>
    private static bool ZipFileDictory(string FolderToZip, string ZipedFile, int level)
    {
        bool res;
        if (!Directory.Exists(FolderToZip))
        {
            return false;
        }

        ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
        s.SetLevel(level);
        res = ZipFileDictory(FolderToZip, s, "");

        s.Finish();
        s.Close();

        return res;
    }

    /// <summary>
    /// 压缩文件
    /// </summary>
    /// <param name="FileToZip">要进行压缩的文件名</param>
    /// <param name="ZipedFile">压缩后生成的压缩文件名</param>
    /// <returns></returns>
    private static bool ZipFile(string FileToZip, string ZipedFile, int level)
    {
        //如果文件没有找到，则报错

        if (!File.Exists(FileToZip))
        {
            throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
        }
        //FileStream fs = null;

        FileStream ZipFile = null;
        ZipOutputStream ZipStream = null;
        ZipEntry ZipEntry = null;
        bool res = true;
        try
        {
            ZipFile = File.OpenRead(FileToZip);
            byte[] buffer = new byte[ZipFile.Length];
            ZipFile.Read(buffer, 0, buffer.Length);
            ZipFile.Close();

            ZipFile = File.Create(ZipedFile);
            ZipStream = new ZipOutputStream(ZipFile);
            ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
            ZipStream.PutNextEntry(ZipEntry);
            ZipStream.SetLevel(level);

            ZipStream.Write(buffer, 0, buffer.Length);
        }
        catch
        {
            res = false;
        }
        finally
        {
            if (ZipEntry != null)
            {
                ZipEntry = null;
            }
            if (ZipStream != null)
            {
                ZipStream.Finish();
                ZipStream.Close();
            }
            if (ZipFile != null)
            {
                ZipFile.Close();
                ZipFile = null;
            }
            GC.Collect();
            GC.Collect(1);
        }

        return res;
    }
    /// <summary>
    /// 压缩文件 和 文件夹
    /// </summary>
    public static bool Zip(String FileToZip, String ZipedFile, int level)
    {
        if (Directory.Exists(FileToZip))
        {
            return ZipFileDictory(FileToZip, ZipedFile, level);
        }
        else if (File.Exists(FileToZip))
        {
            return ZipFile(FileToZip, ZipedFile, level);
        }
        else
        {
            return false;
        }
    }
}
#endregion

#region 解压类

/// <summary>
/// 解压类
/// </summary>
public class UnZipClass
{
    /// <summary>
    /// 解压功能(解压压缩文件到指定目录)
    /// </summary>
    public static void UnZip(string FileToUpZip, string ZipedFolder)
    {
        if (!File.Exists(FileToUpZip))
        {
            return;
        }

        if (!Directory.Exists(ZipedFolder))
        {
            Directory.CreateDirectory(ZipedFolder);
        }

        ZipInputStream s = null;
        ZipEntry theEntry = null;

        string fileName;
        FileStream streamWriter = null;
        try
        {
            s = new ZipInputStream(File.OpenRead(FileToUpZip));
            while ((theEntry = s.GetNextEntry()) != null)
            {
                if (theEntry.Name != String.Empty)
                {
                    fileName = Path.Combine(ZipedFolder, theEntry.Name);
                    ///判断文件路径是否是文件夹

                    if (fileName.EndsWith("/") || fileName.EndsWith("\\"))
                    {
                        Directory.CreateDirectory(fileName);
                        continue;
                    }

                    streamWriter = File.Create(fileName);
                    int size = 2048;
                    byte[] data = new byte[2048];
                    while (true)
                    {
                        size = s.Read(data, 0, data.Length);
                        if (size > 0)
                        {
                            streamWriter.Write(data, 0, size);
                        }
                        else
                        {
                            break;
                        }
                    }
                }
            }
        }
        finally
        {
            if (streamWriter != null)
            {
                streamWriter.Close();
                streamWriter = null;
            }
            if (theEntry != null)
            {
                theEntry = null;
            }
            if (s != null)
            {
                s.Close();
                s = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
    }
}

#endregion
